Resources Contact Us Home
Browse by Category: Main > Information Technology
Class Information
Number: 33/491
Name: Geometrical instruments > Straightedge type > Rules > With attachment > Selectable
Description: Subject matter wherein the straightedge is constructed to provide a choice of ruling edges.

Patents under this class:

Patent Number Title Of Patent Date Issued
8438744 Ruler and method of use May. 14, 2013
7415772 Rainbow ruler Aug. 26, 2008
6813841 Measuring device for teaching incremental measurements Nov. 9, 2004
6816805 Computer generated scale and conversion instrument Nov. 9, 2004
6243959 Measuring and instructional ruler Jun. 12, 2001
5881469 Measuring and instructional ruler Mar. 16, 1999
5822875 Scanning electron microscopic ruler and method Oct. 20, 1998
5479719 Rolling ruler Jan. 2, 1996
4839833 Programmable display engineering scale Jun. 13, 1989
4707928 Vari-scale Nov. 24, 1987

  Recently Added Patents
Data management tool
Method and system for advertisement using internet browser to insert advertisements
Battery terminal with current sensor
Hierarchical binding and lookup of addresses in inter-process communications systems
Printing device, printing system, program, and printing method for printing based on print data from a user authorized to issue a print instruction for the print data
2,4-disubstituted pyrimidines useful as kinase inhibitors
Communication device
  Randomly Featured Patents
Permittivity spectroscopy apparatus and method
Article and means of shaping ice cream
Content managing system
Surgical suture needle of the taper point type
Disk controller methods and apparatus with improved striping, redundancy operations and interfaces
Replacement toner cartridge management apparatus, replacement toner cartridge management system, image forming apparatus, replacement toner cartridge management method, and recording medium
Temperature controller for electric cooking appliances
Morpholine derivatives for treating depression
Apparatus and methods employing infrared absorption means to measure the moisture content of heavy grades of paper
Fuse in top level metal and in a step, process of making and process of trimming